@article{DAN_1978_238_1_a18,
     author = {A. G. Rostomyan and P. A. Bezirganyan},
     title = {Realization of self-focusing of {X-rays} and $\gamma$-rays},
     journal = {Doklady Akademii Nauk},
     pages = {73--76},
     publisher = {mathdoc},
     volume = {238},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_1_a18/}
}